From: Ben Pfaff Date: Tue, 22 Sep 2009 17:17:44 +0000 (-0700) Subject: Merge citrix branch into master. X-Git-Tag: v0.99.0~78 X-Git-Url: http://git.onelab.eu/?p=sliver-openvswitch.git;a=commitdiff_plain;h=576e26d7b47f4e53116ef0b5f035d260f426d37b Merge citrix branch into master. --- 576e26d7b47f4e53116ef0b5f035d260f426d37b diff --cc configure.ac index d5b5938d1,41ff7bea8..400ea7869 --- a/configure.ac +++ b/configure.ac @@@ -12,8 -12,8 +12,8 @@@ # See the License for the specific language governing permissions and # limitations under the License. -AC_PREREQ(2.60) +AC_PREREQ(2.63) - AC_INIT(openvswitch, 0.90.3, bugs@openvswitch.org) + AC_INIT(openvswitch, 0.90.5, ovs-bugs@openvswitch.org) NX_BUILDNR AC_CONFIG_SRCDIR([datapath/datapath.c]) AC_CONFIG_MACRO_DIR([m4]) diff --cc lib/netdev-linux.c index 2faffa346,000000000..5abf6e16b mode 100644,000000..100644 --- a/lib/netdev-linux.c +++ b/lib/netdev-linux.c @@@ -1,1733 -1,0 +1,1736 @@@ +/* + * Copyright (c) 2009 Nicira Networks. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "coverage.h" +#include "dynamic-string.h" +#include "fatal-signal.h" +#include "netdev-provider.h" +#include "netlink.h" +#include "ofpbuf.h" +#include "openflow/openflow.h" +#include "packets.h" +#include "poll-loop.h" +#include "rtnetlink.h" +#include "socket-util.h" +#include "shash.h" +#include "svec.h" + +#define THIS_MODULE VLM_netdev_linux +#include "vlog.h" + +/* These were introduced in Linux 2.6.14, so they might be missing if we have + * old headers. */ +#ifndef ADVERTISED_Pause +#define ADVERTISED_Pause (1 << 13) +#endif +#ifndef ADVERTISED_Asym_Pause +#define ADVERTISED_Asym_Pause (1 << 14) +#endif + +struct netdev_linux { + struct netdev netdev; + + /* File descriptors. For ordinary network devices, the two fds below are + * the same; for tap devices, they differ. */ + int netdev_fd; /* Network device. */ + int tap_fd; /* TAP character device, if any, otherwise the + * network device. */ + + struct netdev_linux_cache *cache; +}; + +enum { + VALID_IFINDEX = 1 << 0, + VALID_ETHERADDR = 1 << 1, + VALID_IN4 = 1 << 2, + VALID_IN6 = 1 << 3, + VALID_MTU = 1 << 4, + VALID_CARRIER = 1 << 5, + VALID_IS_INTERNAL = 1 << 6 +}; + +/* Cached network device information. */ +struct netdev_linux_cache { + struct shash_node *shash_node; + unsigned int valid; + int ref_cnt; + + int ifindex; + uint8_t etheraddr[ETH_ADDR_LEN]; + struct in_addr address, netmask; + struct in6_addr in6; + int mtu; + int carrier; + bool is_internal; +}; + +static struct shash cache_map = SHASH_INITIALIZER(&cache_map); +static struct rtnetlink_notifier netdev_linux_cache_notifier; + +/* An AF_INET socket (used for ioctl operations). */ +static int af_inet_sock = -1; + +struct netdev_linux_notifier { + struct netdev_notifier notifier; + struct list node; +}; + +static struct shash netdev_linux_notifiers = + SHASH_INITIALIZER(&netdev_linux_notifiers); +static struct rtnetlink_notifier netdev_linux_poll_notifier; + +/* This is set pretty low because we probably won't learn anything from the + * additional log messages. */ +static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); + +static int netdev_linux_do_ethtool(struct netdev *, struct ethtool_cmd *, + int cmd, const char *cmd_name); +static int netdev_linux_do_ioctl(const struct netdev *, struct ifreq *, + int cmd, const char *cmd_name); +static int netdev_linux_get_ipv4(const struct netdev *, struct in_addr *, + int cmd, const char *cmd_name); +static int get_flags(const struct netdev *, int *flagsp); +static int set_flags(struct netdev *, int flags); +static int do_get_ifindex(const char *netdev_name); +static int get_ifindex(const struct netdev *, int *ifindexp); +static int do_set_addr(struct netdev *netdev, + int ioctl_nr, const char *ioctl_name, + struct in_addr addr); +static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]); +static int set_etheraddr(const char *netdev_name, int hwaddr_family, + const uint8_t[ETH_ADDR_LEN]); +static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats); +static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats); + +static struct netdev_linux * +netdev_linux_cast(const struct netdev *netdev) +{ + netdev_assert_class(netdev, &netdev_linux_class); + return CONTAINER_OF(netdev, struct netdev_linux, netdev); +} + +static int +netdev_linux_init(void) +{ + static int status = -1; + if (status < 0) { + af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0); + status = af_inet_sock >= 0 ? 0 : errno; + if (status) { + VLOG_ERR("failed to create inet socket: %s", strerror(status)); + } + } + return status; +} + +static void +netdev_linux_run(void) +{ + rtnetlink_notifier_run(); +} + +static void +netdev_linux_wait(void) +{ + rtnetlink_notifier_wait(); +} + +static void +netdev_linux_cache_cb(const struct rtnetlink_change *change, + void *aux UNUSED) +{ + struct netdev_linux_cache *cache; + if (change) { + cache = shash_find_data(&cache_map, change->ifname); + if (cache) { + cache->valid = 0; + } + } else { + struct shash_node *node; + SHASH_FOR_EACH (node, &cache_map) { + cache = node->data; + cache->valid = 0; + } + } +} + +static int +netdev_linux_open(const char *name, char *suffix, int ethertype, + struct netdev **netdevp) +{ + struct netdev_linux *netdev; + enum netdev_flags flags; + int error; + + /* Allocate network device. */ + netdev = xcalloc(1, sizeof *netdev); + netdev_init(&netdev->netdev, suffix, &netdev_linux_class); + netdev->netdev_fd = -1; + netdev->tap_fd = -1; + netdev->cache = shash_find_data(&cache_map, suffix); + if (!netdev->cache) { + if (shash_is_empty(&cache_map)) { + int error = rtnetlink_notifier_register( + &netdev_linux_cache_notifier, netdev_linux_cache_cb, NULL); + if (error) { + netdev_close(&netdev->netdev); + return error; + } + } + netdev->cache = xmalloc(sizeof *netdev->cache); + netdev->cache->shash_node = shash_add(&cache_map, suffix, + netdev->cache); + netdev->cache->valid = 0; + netdev->cache->ref_cnt = 0; + } + netdev->cache->ref_cnt++; + + if (!strncmp(name, "tap:", 4)) { + static const char tap_dev[] = "/dev/net/tun"; + struct ifreq ifr; + + /* Open tap device. */ + netdev->tap_fd = open(tap_dev, O_RDWR); + if (netdev->tap_fd < 0) { + error = errno; + VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error)); + goto error; + } + + /* Create tap device. */ + ifr.ifr_flags = IFF_TAP | IFF_NO_PI; + error = netdev_linux_do_ioctl(&netdev->netdev, &ifr, + TUNSETIFF, "TUNSETIFF"); + if (error) { + goto error; + } + + /* Make non-blocking. */ + error = set_nonblocking(netdev->tap_fd); + if (error) { + goto error; + } + } + + error = netdev_get_flags(&netdev->netdev, &flags); + if (error == ENODEV) { + goto error; + } + + if (netdev->tap_fd >= 0 || ethertype != NETDEV_ETH_TYPE_NONE) { + struct sockaddr_ll sll; + int protocol; + int ifindex; + + /* Create file descriptor. */ + protocol = (ethertype == NETDEV_ETH_TYPE_ANY ? ETH_P_ALL + : ethertype == NETDEV_ETH_TYPE_802_2 ? ETH_P_802_2 + : ethertype); + netdev->netdev_fd = socket(PF_PACKET, SOCK_RAW, htons(protocol)); + if (netdev->netdev_fd < 0) { + error = errno; + goto error; + } + if (netdev->tap_fd < 0) { + netdev->tap_fd = netdev->netdev_fd; + } + + /* Set non-blocking mode. */ + error = set_nonblocking(netdev->netdev_fd); + if (error) { + goto error; + } + + /* Get ethernet device index. */ + error = get_ifindex(&netdev->netdev, &ifindex); + if (error) { + goto error; + } + + /* Bind to specific ethernet device. */ + memset(&sll, 0, sizeof sll); + sll.sll_family = AF_PACKET; + sll.sll_ifindex = ifindex; + if (bind(netdev->netdev_fd, + (struct sockaddr *) &sll, sizeof sll) < 0) { + error = errno; + VLOG_ERR("bind to %s failed: %s", suffix, strerror(error)); + goto error; + } + + /* Between the socket() and bind() calls above, the socket receives all + * packets of the requested type on all system interfaces. We do not + * want to receive that data, but there is no way to avoid it. So we + * must now drain out the receive queue. */ + error = drain_rcvbuf(netdev->netdev_fd); + if (error) { + goto error; + } + } + + *netdevp = &netdev->netdev; + return 0; + +error: + netdev_close(&netdev->netdev); + return error; +} + +/* Closes and destroys 'netdev'. */ +static void +netdev_linux_close(struct netdev *netdev_) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + + if (netdev->cache && !--netdev->cache->ref_cnt) { + shash_delete(&cache_map, netdev->cache->shash_node); + free(netdev->cache); + + if (shash_is_empty(&cache_map)) { + rtnetlink_notifier_unregister(&netdev_linux_cache_notifier); + } + } + if (netdev->netdev_fd >= 0) { + close(netdev->netdev_fd); + } + if (netdev->tap_fd >= 0 && netdev->netdev_fd != netdev->tap_fd) { + close(netdev->tap_fd); + } + free(netdev); +} + +/* Initializes 'svec' with a list of the names of all known network devices. */ +static int +netdev_linux_enumerate(struct svec *svec) +{ + struct if_nameindex *names; + + names = if_nameindex(); + if (names) { + size_t i; + + for (i = 0; names[i].if_name != NULL; i++) { + svec_add(svec, names[i].if_name); + } + if_freenameindex(names); + return 0; + } else { + VLOG_WARN("could not obtain list of network device names: %s", + strerror(errno)); + return errno; + } +} + +static int +netdev_linux_recv(struct netdev *netdev_, void *data, size_t size) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + + if (netdev->tap_fd < 0) { + /* Device was opened with NETDEV_ETH_TYPE_NONE. */ + return EAGAIN; + } + + for (;;) { + ssize_t retval = read(netdev->tap_fd, data, size); + if (retval >= 0) { + return retval; + } else if (errno != EINTR) { + if (errno != EAGAIN) { + VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s", + strerror(errno), netdev_get_name(netdev_)); + } + return errno; + } + } +} + +/* Registers with the poll loop to wake up from the next call to poll_block() + * when a packet is ready to be received with netdev_recv() on 'netdev'. */ +static void +netdev_linux_recv_wait(struct netdev *netdev_) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (netdev->tap_fd >= 0) { + poll_fd_wait(netdev->tap_fd, POLLIN); + } +} + +/* Discards all packets waiting to be received from 'netdev'. */ +static int +netdev_linux_drain(struct netdev *netdev_) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (netdev->tap_fd < 0 && netdev->netdev_fd < 0) { + return 0; + } else if (netdev->tap_fd != netdev->netdev_fd) { + struct ifreq ifr; + int error = netdev_linux_do_ioctl(netdev_, &ifr, + SIOCGIFTXQLEN, "SIOCGIFTXQLEN"); + if (error) { + return error; + } + drain_fd(netdev->tap_fd, ifr.ifr_qlen); + return 0; + } else { + return drain_rcvbuf(netdev->netdev_fd); + } +} + +/* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive + * errno value. Returns EAGAIN without blocking if the packet cannot be queued + * immediately. Returns EMSGSIZE if a partial packet was transmitted or if + * the packet is too big or too small to transmit on the device. + * + * The caller retains ownership of 'buffer' in all cases. + * + * The kernel maintains a packet transmission queue, so the caller is not + * expected to do additional queuing of packets. */ +static int +netdev_linux_send(struct netdev *netdev_, const void *data, size_t size) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + + /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE. + */ + if (netdev->tap_fd < 0) { + return EPIPE; + } + + for (;;) { + ssize_t retval = write(netdev->tap_fd, data, size); + if (retval < 0) { + /* The Linux AF_PACKET implementation never blocks waiting for room + * for packets, instead returning ENOBUFS. Translate this into + * EAGAIN for the caller. */ + if (errno == ENOBUFS) { + return EAGAIN; + } else if (errno == EINTR) { + continue; + } else if (errno != EAGAIN) { + VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s", + netdev_get_name(netdev_), strerror(errno)); + } + return errno; + } else if (retval != size) { + VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of " + "%zu) on %s", retval, size, netdev_get_name(netdev_)); + return EMSGSIZE; + } else { + return 0; + } + } +} + +/* Registers with the poll loop to wake up from the next call to poll_block() + * when the packet transmission queue has sufficient room to transmit a packet + * with netdev_send(). + * + * The kernel maintains a packet transmission queue, so the client is not + * expected to do additional queuing of packets. Thus, this function is + * unlikely to ever be used. It is included for completeness. */ +static void +netdev_linux_send_wait(struct netdev *netdev_) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (netdev->tap_fd < 0 && netdev->netdev_fd < 0) { + /* Nothing to do. */ + } else if (netdev->tap_fd == netdev->netdev_fd) { + poll_fd_wait(netdev->tap_fd, POLLOUT); + } else { + /* TAP device always accepts packets.*/ + poll_immediate_wake(); + } +} + +/* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful, + * otherwise a positive errno value. */ +static int +netdev_linux_set_etheraddr(struct netdev *netdev_, + const uint8_t mac[ETH_ADDR_LEN]) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + int error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac); + if (!error) { + memcpy(netdev->cache->etheraddr, mac, ETH_ADDR_LEN); + } + return error; +} + +/* Returns a pointer to 'netdev''s MAC address. The caller must not modify or + * free the returned buffer. */ +static int +netdev_linux_get_etheraddr(const struct netdev *netdev_, + uint8_t mac[ETH_ADDR_LEN]) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (!(netdev->cache->valid & VALID_ETHERADDR)) { + int error = get_etheraddr(netdev_get_name(netdev_), + netdev->cache->etheraddr); + if (error) { + return error; + } + netdev->cache->valid |= VALID_ETHERADDR; + } + memcpy(mac, netdev->cache->etheraddr, ETH_ADDR_LEN); + return 0; +} + +/* Returns the maximum size of transmitted (and received) packets on 'netdev', + * in bytes, not including the hardware header; thus, this is typically 1500 + * bytes for Ethernet devices. */ +static int +netdev_linux_get_mtu(const struct netdev *netdev_, int *mtup) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (!(netdev->cache->valid & VALID_MTU)) { + struct ifreq ifr; + int error; + + error = netdev_linux_do_ioctl(netdev_, &ifr, SIOCGIFMTU, "SIOCGIFMTU"); + if (error) { + return error; + } + netdev->cache->mtu = ifr.ifr_mtu; + netdev->cache->valid |= VALID_MTU; + } + *mtup = netdev->cache->mtu; + return 0; +} + +static int +netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + int error = 0; + char *fn = NULL; + int fd = -1; + + if (!(netdev->cache->valid & VALID_CARRIER)) { + char line[8]; + int retval; + + fn = xasprintf("/sys/class/net/%s/carrier", netdev_get_name(netdev_)); + fd = open(fn, O_RDONLY); + if (fd < 0) { + error = errno; + VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(error)); + goto exit; + } + + retval = read(fd, line, sizeof line); + if (retval < 0) { + error = errno; + if (error == EINVAL) { + /* This is the normal return value when we try to check carrier + * if the network device is not up. */ + } else { + VLOG_WARN_RL(&rl, "%s: read failed: %s", fn, strerror(error)); + } + goto exit; + } else if (retval == 0) { + error = EPROTO; + VLOG_WARN_RL(&rl, "%s: unexpected end of file", fn); + goto exit; + } + + if (line[0] != '0' && line[0] != '1') { + error = EPROTO; + VLOG_WARN_RL(&rl, "%s: value is %c (expected 0 or 1)", + fn, line[0]); + goto exit; + } + netdev->cache->carrier = line[0] != '0'; + netdev->cache->valid |= VALID_CARRIER; + } + *carrier = netdev->cache->carrier; + error = 0; + +exit: + if (fd >= 0) { + close(fd); + } + free(fn); + return error; +} + +/* Check whether we can we use RTM_GETLINK to get network device statistics. + * In pre-2.6.19 kernels, this was only available if wireless extensions were + * enabled. */ +static bool +check_for_working_netlink_stats(void) +{ + /* Decide on the netdev_get_stats() implementation to use. Netlink is + * preferable, so if that works, we'll use it. */ + int ifindex = do_get_ifindex("lo"); + if (ifindex < 0) { + VLOG_WARN("failed to get ifindex for lo, " + "obtaining netdev stats from proc"); + return false; + } else { + struct netdev_stats stats; + int error = get_stats_via_netlink(ifindex, &stats); + if (!error) { + VLOG_DBG("obtaining netdev stats via rtnetlink"); + return true; + } else { + VLOG_INFO("RTM_GETLINK failed (%s), obtaining netdev stats " + "via proc (you are probably running a pre-2.6.19 " + "kernel)", strerror(error)); + return false; + } + } +} + +/* Retrieves current device stats for 'netdev'. + * + * XXX All of the members of struct netdev_stats are 64 bits wide, but on + * 32-bit architectures the Linux network stats are only 32 bits. */ +static int +netdev_linux_get_stats(const struct netdev *netdev_, struct netdev_stats *stats) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + static int use_netlink_stats = -1; + int error; + struct netdev_stats raw_stats; + struct netdev_stats *collect_stats = stats; + + COVERAGE_INC(netdev_get_stats); + + if (!(netdev->cache->valid & VALID_IS_INTERNAL)) { + netdev->cache->is_internal = (netdev->tap_fd != -1); + + if (!netdev->cache->is_internal) { + struct ethtool_drvinfo drvinfo; + + memset(&drvinfo, 0, sizeof drvinfo); + error = netdev_linux_do_ethtool(&netdev->netdev, + (struct ethtool_cmd *)&drvinfo, + ETHTOOL_GDRVINFO, + "ETHTOOL_GDRVINFO"); + + if (!error) { + netdev->cache->is_internal = !strcmp(drvinfo.driver, + "openvswitch"); + } + } + + netdev->cache->valid |= VALID_IS_INTERNAL; + } + + if (netdev->cache->is_internal) { + collect_stats = &raw_stats; + } + + if (use_netlink_stats < 0) { + use_netlink_stats = check_for_working_netlink_stats(); + } + if (use_netlink_stats) { + int ifindex; + + error = get_ifindex(&netdev->netdev, &ifindex); + if (!error) { + error = get_stats_via_netlink(ifindex, collect_stats); + } + } else { + error = get_stats_via_proc(netdev->netdev.name, collect_stats); + } + + /* If this port is an internal port then the transmit and receive stats + * will appear to be swapped relative to the other ports since we are the + * one sending the data, not a remote computer. For consistency, we swap + * them back here. */ + if (netdev->cache->is_internal) { + stats->rx_packets = raw_stats.tx_packets; + stats->tx_packets = raw_stats.rx_packets; + stats->rx_bytes = raw_stats.tx_bytes; + stats->tx_bytes = raw_stats.rx_bytes; + stats->rx_errors = raw_stats.tx_errors; + stats->tx_errors = raw_stats.rx_errors; + stats->rx_dropped = raw_stats.tx_dropped; + stats->tx_dropped = raw_stats.rx_dropped; + stats->multicast = raw_stats.multicast; + stats->collisions = raw_stats.collisions; + stats->rx_length_errors = 0; + stats->rx_over_errors = 0; + stats->rx_crc_errors = 0; + stats->rx_frame_errors = 0; + stats->rx_fifo_errors = 0; + stats->rx_missed_errors = 0; + stats->tx_aborted_errors = 0; + stats->tx_carrier_errors = 0; + stats->tx_fifo_errors = 0; + stats->tx_heartbeat_errors = 0; + stats->tx_window_errors = 0; + } + + return error; +} + +/* Stores the features supported by 'netdev' into each of '*current', + * '*advertised', '*supported', and '*peer' that are non-null. Each value is a + * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if + * successful, otherwise a positive errno value. On failure, all of the + * passed-in values are set to 0. */ +static int +netdev_linux_get_features(struct netdev *netdev, + uint32_t *current, uint32_t *advertised, + uint32_t *supported, uint32_t *peer) +{ + struct ethtool_cmd ecmd; + int error; + + memset(&ecmd, 0, sizeof ecmd); + error = netdev_linux_do_ethtool(netdev, &ecmd, + ETHTOOL_GSET, "ETHTOOL_GSET"); + if (error) { + return error; + } + + /* Supported features. */ + *supported = 0; + if (ecmd.supported & SUPPORTED_10baseT_Half) { + *supported |= OFPPF_10MB_HD; + } + if (ecmd.supported & SUPPORTED_10baseT_Full) { + *supported |= OFPPF_10MB_FD; + } + if (ecmd.supported & SUPPORTED_100baseT_Half) { + *supported |= OFPPF_100MB_HD; + } + if (ecmd.supported & SUPPORTED_100baseT_Full) { + *supported |= OFPPF_100MB_FD; + } + if (ecmd.supported & SUPPORTED_1000baseT_Half) { + *supported |= OFPPF_1GB_HD; + } + if (ecmd.supported & SUPPORTED_1000baseT_Full) { + *supported |= OFPPF_1GB_FD; + } + if (ecmd.supported & SUPPORTED_10000baseT_Full) { + *supported |= OFPPF_10GB_FD; + } + if (ecmd.supported & SUPPORTED_TP) { + *supported |= OFPPF_COPPER; + } + if (ecmd.supported & SUPPORTED_FIBRE) { + *supported |= OFPPF_FIBER; + } + if (ecmd.supported & SUPPORTED_Autoneg) { + *supported |= OFPPF_AUTONEG; + } + if (ecmd.supported & SUPPORTED_Pause) { + *supported |= OFPPF_PAUSE; + } + if (ecmd.supported & SUPPORTED_Asym_Pause) { + *supported |= OFPPF_PAUSE_ASYM; + } + + /* Advertised features. */ + *advertised = 0; + if (ecmd.advertising & ADVERTISED_10baseT_Half) { + *advertised |= OFPPF_10MB_HD; + } + if (ecmd.advertising & ADVERTISED_10baseT_Full) { + *advertised |= OFPPF_10MB_FD; + } + if (ecmd.advertising & ADVERTISED_100baseT_Half) { + *advertised |= OFPPF_100MB_HD; + } + if (ecmd.advertising & ADVERTISED_100baseT_Full) { + *advertised |= OFPPF_100MB_FD; + } + if (ecmd.advertising & ADVERTISED_1000baseT_Half) { + *advertised |= OFPPF_1GB_HD; + } + if (ecmd.advertising & ADVERTISED_1000baseT_Full) { + *advertised |= OFPPF_1GB_FD; + } + if (ecmd.advertising & ADVERTISED_10000baseT_Full) { + *advertised |= OFPPF_10GB_FD; + } + if (ecmd.advertising & ADVERTISED_TP) { + *advertised |= OFPPF_COPPER; + } + if (ecmd.advertising & ADVERTISED_FIBRE) { + *advertised |= OFPPF_FIBER; + } + if (ecmd.advertising & ADVERTISED_Autoneg) { + *advertised |= OFPPF_AUTONEG; + } + if (ecmd.advertising & ADVERTISED_Pause) { + *advertised |= OFPPF_PAUSE; + } + if (ecmd.advertising & ADVERTISED_Asym_Pause) { + *advertised |= OFPPF_PAUSE_ASYM; + } + + /* Current settings. */ + if (ecmd.speed == SPEED_10) { + *current = ecmd.duplex ? OFPPF_10MB_FD : OFPPF_10MB_HD; + } else if (ecmd.speed == SPEED_100) { + *current = ecmd.duplex ? OFPPF_100MB_FD : OFPPF_100MB_HD; + } else if (ecmd.speed == SPEED_1000) { + *current = ecmd.duplex ? OFPPF_1GB_FD : OFPPF_1GB_HD; + } else if (ecmd.speed == SPEED_10000) { + *current = OFPPF_10GB_FD; + } else { + *current = 0; + } + + if (ecmd.port == PORT_TP) { + *current |= OFPPF_COPPER; + } else if (ecmd.port == PORT_FIBRE) { + *current |= OFPPF_FIBER; + } + + if (ecmd.autoneg) { + *current |= OFPPF_AUTONEG; + } + + /* Peer advertisements. */ + *peer = 0; /* XXX */ + + return 0; +} + +/* Set the features advertised by 'netdev' to 'advertise'. */ +static int +netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise) +{ + struct ethtool_cmd ecmd; + int error; + + memset(&ecmd, 0, sizeof ecmd); + error = netdev_linux_do_ethtool(netdev, &ecmd, + ETHTOOL_GSET, "ETHTOOL_GSET"); + if (error) { + return error; + } + + ecmd.advertising = 0; + if (advertise & OFPPF_10MB_HD) { + ecmd.advertising |= ADVERTISED_10baseT_Half; + } + if (advertise & OFPPF_10MB_FD) { + ecmd.advertising |= ADVERTISED_10baseT_Full; + } + if (advertise & OFPPF_100MB_HD) { + ecmd.advertising |= ADVERTISED_100baseT_Half; + } + if (advertise & OFPPF_100MB_FD) { + ecmd.advertising |= ADVERTISED_100baseT_Full; + } + if (advertise & OFPPF_1GB_HD) { + ecmd.advertising |= ADVERTISED_1000baseT_Half; + } + if (advertise & OFPPF_1GB_FD) { + ecmd.advertising |= ADVERTISED_1000baseT_Full; + } + if (advertise & OFPPF_10GB_FD) { + ecmd.advertising |= ADVERTISED_10000baseT_Full; + } + if (advertise & OFPPF_COPPER) { + ecmd.advertising |= ADVERTISED_TP; + } + if (advertise & OFPPF_FIBER) { + ecmd.advertising |= ADVERTISED_FIBRE; + } + if (advertise & OFPPF_AUTONEG) { + ecmd.advertising |= ADVERTISED_Autoneg; + } + if (advertise & OFPPF_PAUSE) { + ecmd.advertising |= ADVERTISED_Pause; + } + if (advertise & OFPPF_PAUSE_ASYM) { + ecmd.advertising |= ADVERTISED_Asym_Pause; + } + return netdev_linux_do_ethtool(netdev, &ecmd, + ETHTOOL_SSET, "ETHTOOL_SSET"); +} + +/* If 'netdev_name' is the name of a VLAN network device (e.g. one created with + * vconfig(8)), sets '*vlan_vid' to the VLAN VID associated with that device + * and returns 0. Otherwise returns a errno value (specifically ENOENT if + * 'netdev_name' is the name of a network device that is not a VLAN device) and + * sets '*vlan_vid' to -1. */ +static int +netdev_linux_get_vlan_vid(const struct netdev *netdev, int *vlan_vid) +{ + const char *netdev_name = netdev_get_name(netdev); + struct ds line = DS_EMPTY_INITIALIZER; + FILE *stream = NULL; + int error; + char *fn; + + COVERAGE_INC(netdev_get_vlan_vid); + fn = xasprintf("/proc/net/vlan/%s", netdev_name); + stream = fopen(fn, "r"); + if (!stream) { + error = errno; + goto done; + } + + if (ds_get_line(&line, stream)) { + if (ferror(stream)) { + error = errno; + VLOG_ERR_RL(&rl, "error reading \"%s\": %s", fn, strerror(errno)); + } else { + error = EPROTO; + VLOG_ERR_RL(&rl, "unexpected end of file reading \"%s\"", fn); + } + goto done; + } + + if (!sscanf(ds_cstr(&line), "%*s VID: %d", vlan_vid)) { + error = EPROTO; + VLOG_ERR_RL(&rl, "parse error reading \"%s\" line 1: \"%s\"", + fn, ds_cstr(&line)); + goto done; + } + + error = 0; + +done: + free(fn); + if (stream) { + fclose(stream); + } + ds_destroy(&line); + if (error) { + *vlan_vid = -1; + } + return error; +} + +#define POLICE_ADD_CMD "/sbin/tc qdisc add dev %s handle ffff: ingress" +#define POLICE_CONFIG_CMD "/sbin/tc filter add dev %s parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate %dkbit burst %dk mtu 65535 drop flowid :1" +/* We redirect stderr to /dev/null because we often want to remove all + * traffic control configuration on a port so its in a known state. If + * this done when there is no such configuration, tc complains, so we just + * always ignore it. + */ +#define POLICE_DEL_CMD "/sbin/tc qdisc del dev %s handle ffff: ingress 2>/dev/null" + +/* Attempts to set input rate limiting (policing) policy. */ +static int +netdev_linux_set_policing(struct netdev *netdev, + uint32_t kbits_rate, uint32_t kbits_burst) +{ + const char *netdev_name = netdev_get_name(netdev); + char command[1024]; + + COVERAGE_INC(netdev_set_policing); + if (kbits_rate) { + if (!kbits_burst) { + /* Default to 10 kilobits if not specified. */ + kbits_burst = 10; + } + + /* xxx This should be more careful about only adding if it + * xxx actually exists, as opposed to always deleting it. */ + snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name); + if (system(command) == -1) { + VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name); + } + + snprintf(command, sizeof(command), POLICE_ADD_CMD, netdev_name); + if (system(command) != 0) { + VLOG_WARN_RL(&rl, "%s: problem adding policing", netdev_name); + return -1; + } + + snprintf(command, sizeof(command), POLICE_CONFIG_CMD, netdev_name, + kbits_rate, kbits_burst); + if (system(command) != 0) { + VLOG_WARN_RL(&rl, "%s: problem configuring policing", + netdev_name); + return -1; + } + } else { + snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name); + if (system(command) == -1) { + VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name); + } + } + + return 0; +} + +static int +netdev_linux_get_in4(const struct netdev *netdev_, + struct in_addr *address, struct in_addr *netmask) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (!(netdev->cache->valid & VALID_IN4)) { + int error; + + error = netdev_linux_get_ipv4(netdev_, &netdev->cache->address, + SIOCGIFADDR, "SIOCGIFADDR"); + if (error) { + return error; + } + + error = netdev_linux_get_ipv4(netdev_, &netdev->cache->netmask, + SIOCGIFNETMASK, "SIOCGIFNETMASK"); + if (error) { + return error; + } + + netdev->cache->valid |= VALID_IN4; + } + *address = netdev->cache->address; + *netmask = netdev->cache->netmask; + return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0; +} + +static int +netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address, + struct in_addr netmask) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + int error; + + error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address); + if (!error) { + netdev->cache->valid |= VALID_IN4; + netdev->cache->address = address; + netdev->cache->netmask = netmask; + if (address.s_addr != INADDR_ANY) { + error = do_set_addr(netdev_, SIOCSIFNETMASK, + "SIOCSIFNETMASK", netmask); + } + } + return error; +} + +static bool +parse_if_inet6_line(const char *line, + struct in6_addr *in6, char ifname[16 + 1]) +{ + uint8_t *s6 = in6->s6_addr; +#define X8 "%2"SCNx8 + return sscanf(line, + " "X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 + "%*x %*x %*x %*x %16s\n", + &s6[0], &s6[1], &s6[2], &s6[3], + &s6[4], &s6[5], &s6[6], &s6[7], + &s6[8], &s6[9], &s6[10], &s6[11], + &s6[12], &s6[13], &s6[14], &s6[15], + ifname) == 17; +} + +/* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if + * 'in6' is non-null) and returns true. Otherwise, returns false. */ +static int +netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + if (!(netdev->cache->valid & VALID_IN6)) { + FILE *file; + char line[128]; + + netdev->cache->in6 = in6addr_any; + + file = fopen("/proc/net/if_inet6", "r"); + if (file != NULL) { + const char *name = netdev_get_name(netdev_); + while (fgets(line, sizeof line, file)) { + struct in6_addr in6; + char ifname[16 + 1]; + if (parse_if_inet6_line(line, &in6, ifname) + && !strcmp(name, ifname)) + { + netdev->cache->in6 = in6; + break; + } + } + fclose(file); + } + netdev->cache->valid |= VALID_IN6; + } + *in6 = netdev->cache->in6; + return 0; +} + +static void +make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr) +{ + struct sockaddr_in sin; + memset(&sin, 0, sizeof sin); + sin.sin_family = AF_INET; + sin.sin_addr = addr; + sin.sin_port = 0; + + memset(sa, 0, sizeof *sa); + memcpy(sa, &sin, sizeof sin); +} + +static int +do_set_addr(struct netdev *netdev, + int ioctl_nr, const char *ioctl_name, struct in_addr addr) +{ + struct ifreq ifr; + strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name); + make_in4_sockaddr(&ifr.ifr_addr, addr); + return netdev_linux_do_ioctl(netdev, &ifr, ioctl_nr, ioctl_name); +} + +/* Adds 'router' as a default IP gateway. */ +static int +netdev_linux_add_router(struct netdev *netdev UNUSED, struct in_addr router) +{ + struct in_addr any = { INADDR_ANY }; + struct rtentry rt; + int error; + + memset(&rt, 0, sizeof rt); + make_in4_sockaddr(&rt.rt_dst, any); + make_in4_sockaddr(&rt.rt_gateway, router); + make_in4_sockaddr(&rt.rt_genmask, any); + rt.rt_flags = RTF_UP | RTF_GATEWAY; + COVERAGE_INC(netdev_add_router); + error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0; + if (error) { + VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error)); + } + return error; +} + +static int +netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop, + char **netdev_name) +{ + static const char fn[] = "/proc/net/route"; + FILE *stream; + char line[256]; + int ln; + + *netdev_name = NULL; + stream = fopen(fn, "r"); + if (stream == NULL) { + VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno)); + return errno; + } + + ln = 0; + while (fgets(line, sizeof line, stream)) { + if (++ln >= 2) { + char iface[17]; + uint32_t dest, gateway, mask; + int refcnt, metric, mtu; + unsigned int flags, use, window, irtt; + + if (sscanf(line, + "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32 + " %d %u %u\n", + iface, &dest, &gateway, &flags, &refcnt, + &use, &metric, &mask, &mtu, &window, &irtt) != 11) { + + VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s", + fn, ln, line); + continue; + } + if (!(flags & RTF_UP)) { + /* Skip routes that aren't up. */ + continue; + } + + /* The output of 'dest', 'mask', and 'gateway' were given in + * network byte order, so we don't need need any endian + * conversions here. */ + if ((dest & mask) == (host->s_addr & mask)) { + if (!gateway) { + /* The host is directly reachable. */ + next_hop->s_addr = 0; + } else { + /* To reach the host, we must go through a gateway. */ + next_hop->s_addr = gateway; + } + *netdev_name = xstrdup(iface); + fclose(stream); + return 0; + } + } + } + + fclose(stream); + return ENXIO; +} + +/* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be + * successfully retrieved, it stores the corresponding MAC address in 'mac' and + * returns 0. Otherwise, it returns a positive errno value; in particular, + * ENXIO indicates that there is not ARP table entry for 'ip' on 'netdev'. */ +static int +netdev_linux_arp_lookup(const struct netdev *netdev, + uint32_t ip, uint8_t mac[ETH_ADDR_LEN]) +{ + struct arpreq r; + struct sockaddr_in *pa; + int retval; + + memset(&r, 0, sizeof r); + pa = (struct sockaddr_in *) &r.arp_pa; + pa->sin_family = AF_INET; + pa->sin_addr.s_addr = ip; + pa->sin_port = 0; + r.arp_ha.sa_family = ARPHRD_ETHER; + r.arp_flags = 0; + strncpy(r.arp_dev, netdev->name, sizeof r.arp_dev); + COVERAGE_INC(netdev_arp_lookup); + retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0; + if (!retval) { + memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN); + } else if (retval != ENXIO) { + VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s", + netdev->name, IP_ARGS(&ip), strerror(retval)); + } + return retval; +} + +static int +nd_to_iff_flags(enum netdev_flags nd) +{ + int iff = 0; + if (nd & NETDEV_UP) { + iff |= IFF_UP; + } + if (nd & NETDEV_PROMISC) { + iff |= IFF_PROMISC; + } + return iff; +} + +static int +iff_to_nd_flags(int iff) +{ + enum netdev_flags nd = 0; + if (iff & IFF_UP) { + nd |= NETDEV_UP; + } + if (iff & IFF_PROMISC) { + nd |= NETDEV_PROMISC; + } + return nd; +} + +static int +netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off, + enum netdev_flags on, enum netdev_flags *old_flagsp) +{ + int old_flags, new_flags; + int error; + + error = get_flags(netdev, &old_flags); + if (!error) { + *old_flagsp = iff_to_nd_flags(old_flags); + new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on); + if (new_flags != old_flags) { + error = set_flags(netdev, new_flags); + } + } + return error; +} + +static void +poll_notify(struct list *list) +{ + struct netdev_linux_notifier *notifier; + LIST_FOR_EACH (notifier, struct netdev_linux_notifier, node, list) { + struct netdev_notifier *n = ¬ifier->notifier; + n->cb(n); + } +} + +static void +netdev_linux_poll_cb(const struct rtnetlink_change *change, + void *aux UNUSED) +{ + if (change) { + struct list *list = shash_find_data(&netdev_linux_notifiers, + change->ifname); + if (list) { + poll_notify(list); + } + } else { + struct shash_node *node; + SHASH_FOR_EACH (node, &netdev_linux_notifiers) { + poll_notify(node->data); + } + } +} + +static int +netdev_linux_poll_add(struct netdev *netdev, + void (*cb)(struct netdev_notifier *), void *aux, + struct netdev_notifier **notifierp) +{ + const char *netdev_name = netdev_get_name(netdev); + struct netdev_linux_notifier *notifier; + struct list *list; + + if (shash_is_empty(&netdev_linux_notifiers)) { + int error = rtnetlink_notifier_register(&netdev_linux_poll_notifier, + netdev_linux_poll_cb, NULL); + if (error) { + return error; + } + } + + list = shash_find_data(&netdev_linux_notifiers, netdev_name); + if (!list) { + list = xmalloc(sizeof *list); + list_init(list); + shash_add(&netdev_linux_notifiers, netdev_name, list); + } + + notifier = xmalloc(sizeof *notifier); + netdev_notifier_init(¬ifier->notifier, netdev, cb, aux); + list_push_back(list, ¬ifier->node); + *notifierp = ¬ifier->notifier; + return 0; +} + +static void +netdev_linux_poll_remove(struct netdev_notifier *notifier_) +{ + struct netdev_linux_notifier *notifier = + CONTAINER_OF(notifier_, struct netdev_linux_notifier, notifier); + struct list *list; + + /* Remove 'notifier' from its list. */ + list = list_remove(¬ifier->node); + if (list_is_empty(list)) { + /* The list is now empty. Remove it from the hash and free it. */ + const char *netdev_name = netdev_get_name(notifier->notifier.netdev); + shash_delete(&netdev_linux_notifiers, + shash_find(&netdev_linux_notifiers, netdev_name)); + free(list); + } + free(notifier); + + /* If that was the last notifier, unregister. */ + if (shash_is_empty(&netdev_linux_notifiers)) { + rtnetlink_notifier_unregister(&netdev_linux_poll_notifier); + } +} + +const struct netdev_class netdev_linux_class = { + "", /* prefix */ + "linux", /* name */ + + netdev_linux_init, + netdev_linux_run, + netdev_linux_wait, + + netdev_linux_open, + netdev_linux_close, + + netdev_linux_enumerate, + + netdev_linux_recv, + netdev_linux_recv_wait, + netdev_linux_drain, + + netdev_linux_send, + netdev_linux_send_wait, + + netdev_linux_set_etheraddr, + netdev_linux_get_etheraddr, + netdev_linux_get_mtu, + netdev_linux_get_carrier, + netdev_linux_get_stats, + + netdev_linux_get_features, + netdev_linux_set_advertisements, + netdev_linux_get_vlan_vid, + netdev_linux_set_policing, + + netdev_linux_get_in4, + netdev_linux_set_in4, + netdev_linux_get_in6, + netdev_linux_add_router, + netdev_linux_get_next_hop, + netdev_linux_arp_lookup, + + netdev_linux_update_flags, + + netdev_linux_poll_add, + netdev_linux_poll_remove, +}; + +const struct netdev_class netdev_tap_class = { + "tap", /* prefix */ + "tap", /* name */ + + netdev_linux_init, + NULL, /* run */ + NULL, /* wait */ + + netdev_linux_open, + netdev_linux_close, + + netdev_linux_enumerate, + + netdev_linux_recv, + netdev_linux_recv_wait, + netdev_linux_drain, + + netdev_linux_send, + netdev_linux_send_wait, + + netdev_linux_set_etheraddr, + netdev_linux_get_etheraddr, + netdev_linux_get_mtu, + netdev_linux_get_carrier, + netdev_linux_get_stats, + + netdev_linux_get_features, + netdev_linux_set_advertisements, + netdev_linux_get_vlan_vid, + netdev_linux_set_policing, + + netdev_linux_get_in4, + netdev_linux_set_in4, + netdev_linux_get_in6, + netdev_linux_add_router, + netdev_linux_get_next_hop, + netdev_linux_arp_lookup, + + netdev_linux_update_flags, + + netdev_linux_poll_add, + netdev_linux_poll_remove, +}; + +static int +get_stats_via_netlink(int ifindex, struct netdev_stats *stats) +{ + /* Policy for RTNLGRP_LINK messages. + * + * There are *many* more fields in these messages, but currently we only + * care about these fields. */ + static const struct nl_policy rtnlgrp_link_policy[] = { + [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false }, + [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true, + .min_len = sizeof(struct rtnl_link_stats) }, + }; + + + static struct nl_sock *rtnl_sock; + struct ofpbuf request; + struct ofpbuf *reply; + struct ifinfomsg *ifi; + const struct rtnl_link_stats *rtnl_stats; + struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)]; + int error; + + if (!rtnl_sock) { + error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &rtnl_sock); + if (error) { + VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s", + strerror(error)); + return error; + } + } + + ofpbuf_init(&request, 0); + nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *ifi, + RTM_GETLINK, NLM_F_REQUEST); + ifi = ofpbuf_put_zeros(&request, sizeof *ifi); + ifi->ifi_family = PF_UNSPEC; + ifi->ifi_index = ifindex; + error = nl_sock_transact(rtnl_sock, &request, &reply); + ofpbuf_uninit(&request); + if (error) { + return error; + } + + if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg), + rtnlgrp_link_policy, + attrs, ARRAY_SIZE(rtnlgrp_link_policy))) { + ofpbuf_delete(reply); + return EPROTO; + } + + if (!attrs[IFLA_STATS]) { + VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats"); ++ ofpbuf_delete(reply); + return EPROTO; + } + + rtnl_stats = nl_attr_get(attrs[IFLA_STATS]); + stats->rx_packets = rtnl_stats->rx_packets; + stats->tx_packets = rtnl_stats->tx_packets; + stats->rx_bytes = rtnl_stats->rx_bytes; + stats->tx_bytes = rtnl_stats->tx_bytes; + stats->rx_errors = rtnl_stats->rx_errors; + stats->tx_errors = rtnl_stats->tx_errors; + stats->rx_dropped = rtnl_stats->rx_dropped; + stats->tx_dropped = rtnl_stats->tx_dropped; + stats->multicast = rtnl_stats->multicast; + stats->collisions = rtnl_stats->collisions; + stats->rx_length_errors = rtnl_stats->rx_length_errors; + stats->rx_over_errors = rtnl_stats->rx_over_errors; + stats->rx_crc_errors = rtnl_stats->rx_crc_errors; + stats->rx_frame_errors = rtnl_stats->rx_frame_errors; + stats->rx_fifo_errors = rtnl_stats->rx_fifo_errors; + stats->rx_missed_errors = rtnl_stats->rx_missed_errors; + stats->tx_aborted_errors = rtnl_stats->tx_aborted_errors; + stats->tx_carrier_errors = rtnl_stats->tx_carrier_errors; + stats->tx_fifo_errors = rtnl_stats->tx_fifo_errors; + stats->tx_heartbeat_errors = rtnl_stats->tx_heartbeat_errors; + stats->tx_window_errors = rtnl_stats->tx_window_errors; + ++ ofpbuf_delete(reply); ++ + return 0; +} + +static int +get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats) +{ + static const char fn[] = "/proc/net/dev"; + char line[1024]; + FILE *stream; + int ln; + + stream = fopen(fn, "r"); + if (!stream) { + VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno)); + return errno; + } + + ln = 0; + while (fgets(line, sizeof line, stream)) { + if (++ln >= 3) { + char devname[16]; +#define X64 "%"SCNu64 + if (sscanf(line, + " %15[^:]:" + X64 X64 X64 X64 X64 X64 X64 "%*u" + X64 X64 X64 X64 X64 X64 X64 "%*u", + devname, + &stats->rx_bytes, + &stats->rx_packets, + &stats->rx_errors, + &stats->rx_dropped, + &stats->rx_fifo_errors, + &stats->rx_frame_errors, + &stats->multicast, + &stats->tx_bytes, + &stats->tx_packets, + &stats->tx_errors, + &stats->tx_dropped, + &stats->tx_fifo_errors, + &stats->collisions, + &stats->tx_carrier_errors) != 15) { + VLOG_WARN_RL(&rl, "%s:%d: parse error", fn, ln); + } else if (!strcmp(devname, netdev_name)) { + stats->rx_length_errors = UINT64_MAX; + stats->rx_over_errors = UINT64_MAX; + stats->rx_crc_errors = UINT64_MAX; + stats->rx_missed_errors = UINT64_MAX; + stats->tx_aborted_errors = UINT64_MAX; + stats->tx_heartbeat_errors = UINT64_MAX; + stats->tx_window_errors = UINT64_MAX; + fclose(stream); + return 0; + } + } + } + VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name); + fclose(stream); + return ENODEV; +} + +static int +get_flags(const struct netdev *netdev, int *flags) +{ + struct ifreq ifr; + int error; + + error = netdev_linux_do_ioctl(netdev, &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS"); + *flags = ifr.ifr_flags; + return error; +} + +static int +set_flags(struct netdev *netdev, int flags) +{ + struct ifreq ifr; + + ifr.ifr_flags = flags; + return netdev_linux_do_ioctl(netdev, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS"); +} + +static int +do_get_ifindex(const char *netdev_name) +{ + struct ifreq ifr; + + strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); + COVERAGE_INC(netdev_get_ifindex); + if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) { + VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s", + netdev_name, strerror(errno)); + return -errno; + } + return ifr.ifr_ifindex; +} + +static int +get_ifindex(const struct netdev *netdev_, int *ifindexp) +{ + struct netdev_linux *netdev = netdev_linux_cast(netdev_); + *ifindexp = 0; + if (!(netdev->cache->valid & VALID_IFINDEX)) { + int ifindex = do_get_ifindex(netdev_get_name(netdev_)); + if (ifindex < 0) { + return -ifindex; + } + netdev->cache->valid |= VALID_IFINDEX; + netdev->cache->ifindex = ifindex; + } + *ifindexp = netdev->cache->ifindex; + return 0; +} + +static int +get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]) +{ + struct ifreq ifr; + int hwaddr_family; + + memset(&ifr, 0, sizeof ifr); + strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); + COVERAGE_INC(netdev_get_hwaddr); + if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) { + VLOG_ERR("ioctl(SIOCGIFHWADDR) on %s device failed: %s", + netdev_name, strerror(errno)); + return errno; + } + hwaddr_family = ifr.ifr_hwaddr.sa_family; + if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) { + VLOG_WARN("%s device has unknown hardware address family %d", + netdev_name, hwaddr_family); + } + memcpy(ea, ifr.ifr_hwaddr.sa_data, ETH_ADDR_LEN); + return 0; +} + +static int +set_etheraddr(const char *netdev_name, int hwaddr_family, + const uint8_t mac[ETH_ADDR_LEN]) +{ + struct ifreq ifr; + + memset(&ifr, 0, sizeof ifr); + strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name); + ifr.ifr_hwaddr.sa_family = hwaddr_family; + memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN); + COVERAGE_INC(netdev_set_hwaddr); + if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) { + VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s", + netdev_name, strerror(errno)); + return errno; + } + return 0; +} + +static int +netdev_linux_do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd, + int cmd, const char *cmd_name) +{ + struct ifreq ifr; + + memset(&ifr, 0, sizeof ifr); + strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name); + ifr.ifr_data = (caddr_t) ecmd; + + ecmd->cmd = cmd; + COVERAGE_INC(netdev_ethtool); + if (ioctl(af_inet_sock, SIOCETHTOOL, &ifr) == 0) { + return 0; + } else { + if (errno != EOPNOTSUPP) { + VLOG_WARN_RL(&rl, "ethtool command %s on network device %s " + "failed: %s", cmd_name, netdev->name, + strerror(errno)); + } else { + /* The device doesn't support this operation. That's pretty + * common, so there's no point in logging anything. */ + } + return errno; + } +} + +static int +netdev_linux_do_ioctl(const struct netdev *netdev, struct ifreq *ifr, + int cmd, const char *cmd_name) +{ + strncpy(ifr->ifr_name, netdev_get_name(netdev), sizeof ifr->ifr_name); + if (ioctl(af_inet_sock, cmd, ifr) == -1) { + VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", + netdev_get_name(netdev), cmd_name, strerror(errno)); + return errno; + } + return 0; +} + +static int +netdev_linux_get_ipv4(const struct netdev *netdev, struct in_addr *ip, + int cmd, const char *cmd_name) +{ + struct ifreq ifr; + int error; + + ifr.ifr_addr.sa_family = AF_INET; + error = netdev_linux_do_ioctl(netdev, &ifr, cmd, cmd_name); + if (!error) { + const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr; + *ip = sin->sin_addr; + } + return error; +}